package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Override
    @Transactional  //事务注解：操作两张表要么都成功，要么都失败
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);//属性拷贝，需要属性命名保持一致
        //向菜品表插入1条数据
        dishMapper.insert(dish);
        //获取insert语句生成的主键值
        Long dishId=dish.getId();//要在DishMapper.xml中设置属性值才能获取Dish类中的id值
        //向口味表插入n条数据
        List<DishFlavor> flavors=dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0){//说明口味数据提交过来了
          flavors.forEach(dishFlavor -> {
              dishFlavor.setDishId(dishId);
          });
            dishFlavorMapper.insertBatch(flavors);

        }

        //todo
    }

    @Override
    public PageResult find(DishPageQueryDTO dishPageQueryDTO) {//菜品分页查询
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<Dish> page=dishMapper.find(dishPageQueryDTO);//返回Dish类型的集合
        PageResult pageResult=new PageResult();
        pageResult.setTotal(page.getTotal());
        pageResult.setRecords(page.getResult());
        return pageResult;
    }

    @Override
    @Transactional//多个数据表的操作  要加个事务注解  即要么表都删除  要么都不删
    public void deleteBatch(List<Long> ids) {//批量删除菜品
        //判断当前菜品是否可以删除---是否在起售中  根据status
        for(Long id:ids){
        Dish dish =dishMapper.getById(id);
        if(dish.getStatus()== StatusConstant.ENABLE){//是否=1，即是否起售
            //起售中不能删除菜品
            throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
        }
        }
        //判断当前菜品是否被套餐关联
        List<Long> setmealIds=setmealDishMapper.getSetmealIdByDishIds(ids);
        if(setmealIds!=null&&setmealIds.size()>0){//说明菜品被套餐关联了
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);//被套餐关联的菜品不能删除
        }
        //删除菜品表的菜品数据
      for(Long id:ids){
          dishMapper.deleteById(id);
          //删除菜品关联的口味数据
         // dishFlavorMapper.deteteByDishId(200L);//用于测试删除口味表会不会报错

          dishFlavorMapper.deteteByDishId(id);
      }

    }

    @Override
    public DishVO getByIdWidthFlavor(Long id) {//根据id查询菜品和对应的口味数据
        //根据id查询菜品数据
        Dish dish=dishMapper.getById(id);
        //根据菜品id查询口味数据
       List<DishFlavor> dishFlavors= dishFlavorMapper.getByDishId(id);
        //将查询到的数据封装到VO
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);//属性拷贝
        dishVO.setFlavors(dishFlavors);//手动设置菜品的口味值
        return dishVO;
    }



    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);//之前没有实现list方法

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
    Long id= dishDTO.getId();//菜品的id
        dishMapper.update(dishDTO);
    }
}
